CN221447392U

CN221447392U - Battery module, battery pack and electronic equipment

Info

Publication number: CN221447392U
Application number: CN202323174805.1U
Authority: CN
Inventors: 左永杰
Original assignee: Shanghai Lanjun New Energy Technology Co Ltd
Current assignee: Shanghai Lanjun New Energy Technology Co Ltd
Priority date: 2023-11-23
Filing date: 2023-11-23
Publication date: 2024-07-30
Anticipated expiration: 2033-11-23

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery module, a battery pack and electronic equipment. The battery module comprises a battery accommodating part and a battery module arranged in the battery accommodating part, wherein the battery module comprises a first end face, the battery accommodating part comprises a second end face which can be abutted with the first end face, one of the first end face and the second end face is provided with a limiting groove, the other one of the first end face and the second end face is provided with a limiting part, and the limiting part can extend into and be accommodated in the limiting groove. The battery module is simple in structure, light in weight, convenient to assemble and capable of improving production efficiency and reducing production cost, and the number of parts is reduced.

Description

Battery module, battery pack and electronic equipment

Technical Field

The present utility model relates to the field of battery technologies, and in particular, to a battery module, a battery pack, and an electronic device.

Background

With the vigorous development of new energy automobiles and the continuous rising of market share, the requirements of users and markets on the endurance mileage, the quick charging capability, the use safety and the manufacturing cost of the new energy automobiles are also higher and higher. The existing new energy automobile often uses a soft-package battery as a power source of the automobile, and the breathing effect of the soft-package battery in the charging and discharging processes, and the combined action of expansion and shrinkage and pretightening force in the group use process can have great influence on the service life of the battery. Therefore, it is important to set a proper pretightening force after the battery is assembled.

In order to maintain the size of the battery pack, a certain pretightening force is applied to the group of soft pack batteries in the thickness direction. The pretightening force not only affects the thickness expansion rate of the soft package battery, but also affects the service life of the battery. The soft package battery is applied with a certain pretightening force in the battery module, so that the electrochemical performance of the soft package lithium ion power battery can be improved, and the damage of overdischarge can be restrained to a certain extent.

Traditional battery module often encloses by end plate and curb plate and establishes the casing of constitution holding battery or uses end plate and plastic steel area direct packing battery to constitute, carries out bolt fastening with the box through the end plate of module both sides. Because of the pretightening force requirement of the battery module, the distance between the end plates is limited by the side plates or the plastic steel belt at present, and the end plates are used for applying pretightening force to the internal soft package battery; meanwhile, the battery module is fixed through fixing holes in the bolt fixing end plates and the box body frame of the battery pack, the assembly process is complex, the number of required parts is large, development cost is high, and production efficiency is low.

Therefore, it is desirable to provide a novel battery module, so as to solve the above-mentioned technical problems in the prior art.

Disclosure of utility model

The utility model aims to provide a battery module which is simple in structure, light in weight and convenient to assemble, and can improve production efficiency and reduce production cost.

To achieve the purpose, the utility model adopts the following technical scheme:

The battery module comprises a battery accommodating part and a battery module arranged in the battery accommodating part, wherein the battery module comprises a first end face, the battery accommodating part comprises a second end face which can be abutted with the first end face, one of the first end face and the second end face is provided with a limiting groove, the other one of the first end face and the second end face is provided with a limiting part, and the limiting part can extend into and be accommodated in the limiting groove.

Optionally, the battery module includes a cell stack and a first end plate, where any end surface of the cell stack, which is disposed opposite to the first direction, abuts against the first end plate, and a sidewall of the first end plate, which is far away from the cell stack, is the first end surface, and the first end surface is provided with a limiting member; the first direction is a thickness direction of the cell unit of the cell stack.

Optionally, two first end plates are provided, the two first end plates are oppositely disposed at two ends of the cell stack body along the first direction, and at least one first end plate is provided with the limiting member.

Optionally, the two first end plates are provided with the limiting parts, and the two inner walls of the battery accommodating part, which are oppositely arranged, are provided with the limiting grooves.

Optionally, each of the first end plates is provided with a plurality of limiting members at intervals, and the inner wall of the battery accommodating member is provided with a plurality of limiting grooves corresponding to the limiting members one to one.

Optionally, the limiting piece is a limiting boss, a sliding block or an elastic buckle protruding from the first end surface.

Optionally, the limiting piece is the above-mentioned spacing boss that the cooperation was inserted in above-mentioned spacing inslot, and from the one end that above-mentioned spacing boss kept away from above-mentioned first terminal surface to the in-process of extending of the other end, the cross-sectional area of above-mentioned spacing boss increases gradually.

Optionally, the first end plate is provided with a mounting hole, through which an external device can apply a force in the first direction to the first end plate.

Another object of the present utility model is to provide a battery pack including a battery management module and the battery module according to any one of the above aspects, the battery management module being electrically connected to the battery module.

It is still another object of the present utility model to provide an electronic device including the battery pack according to the above aspect.

The beneficial effects are that:

According to the battery module, the limiting groove is formed in any one of the second end face of the battery accommodating part or the first end face of the battery module, and meanwhile the other limiting part extending into and accommodating the limiting groove is arranged, so that the battery cell stacking body can be limited in any direction and pretightening force can be applied to the battery cell stacking body through the limiting action of the limiting groove and the limiting part and the abutting of the first end face and the second end face, and normal operation of an internal battery cell unit is ensured. The battery module is simple in structure and light in weight, the fixed battery cell stacking body is contained in the battery module without an additional side plate or a packing belt, the number of parts is reduced, the assembly is more convenient, the production efficiency can be improved, and the production cost can be reduced.

Drawings

Fig. 1 is an isometric view of a battery module part mechanism provided in an embodiment of the present utility model;

Fig. 2 is an exploded view of a part of the structure of a battery module according to an embodiment of the present utility model;

fig. 3 is an isometric view of a battery module provided in an embodiment of the utility model.

In the figure:

100. a second end plate; 110. a limit groove; 200. a battery module; 210. a cell stack; 211. a cell unit; 220. a first end plate; 221. a limiting piece; 222. and (5) mounting holes.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The first direction in this embodiment is the X direction shown in fig. 1 and 3, that is, the thickness direction of the cell unit 211; the second direction is the Y direction shown in fig. 1 and 3, i.e., the height direction of the battery cell 211; the third direction is the Z direction shown in fig. 1 and 3, that is, the width direction of the cell unit 211; the first direction, the second direction and the third direction are perpendicular to each other.

Referring to fig. 1 and 2, the battery module includes a battery accommodating member and a battery module 200, wherein the battery module 200 includes a first end surface, the battery accommodating member includes a second end surface capable of abutting against the first end surface, one of the first end surface and the second end surface is provided with a limiting groove 110, the other is provided with a limiting member 221, and the limiting member 221 can be inserted into and accommodated in the limiting groove 110.

The battery module is provided with the limit groove 110 through any one of the second end face of the battery accommodating part or the first end face of the battery module 200, and meanwhile, the other one of the battery module is provided with the limit part 221 extending into and accommodated in the limit groove 110, and through the limit action of the limit groove 110 and the limit part 221 and the abutting connection of the first end face and the second end face, the battery cell stacking body 210 can be limited in any direction, the pretightening force can be applied to the battery cell stacking body 210, and the normal operation of the internal battery cell unit 211 is ensured. The battery module is simple in structure and light in weight, the fixed battery cell stacking body 210 is accommodated without an additional side plate or a packing belt, the number of parts is reduced, assembly is more convenient, production efficiency can be improved, and production cost is reduced.

Specifically, at least one inner wall of the battery accommodating member is provided with a limit groove 110; the battery module 200 is accommodated in the battery accommodating member, the battery module 200 includes a cell stack 210 and a first end plate 220, any end surface of the cell stack 210 disposed opposite to each other in a first direction is abutted against the first end plate 220, a limiting member 221 is disposed on a sidewall of the first end plate 220 away from the cell stack 210, and the limiting member 221 is limitedly connected in the limiting groove 110 such that the limiting member 221 is applied with a force in a second direction and a third direction; the first direction is a thickness direction of the cell units 211 of the cell stack 210, and the first direction, the second direction, and the third direction are perpendicular to each other.

The battery module in this embodiment is provided with the limiting groove 110 through the inner wall of the battery accommodating part, and meanwhile, the battery module 200 in the battery accommodating part includes the battery cell stacking body 210 and the first end plates 220 at two ends of the stacking direction of the battery cell stacking body 210, the first end plates 220 are provided with the limiting parts 221 in limiting connection with the limiting groove 110, and the battery accommodating part and the limiting groove 110 exert acting force on the limiting parts 221 and the first end plates 220, so that the battery cell stacking body 210 can be limited in the first direction, the second direction and the third direction, and the pretightening force of the battery cell stacking body 210 Shi Jiayan in the first direction can be ensured, and the normal operation of the internal battery cell 211 is ensured.

With continued reference to fig. 1 and 2, two first end plates 220 are provided, two first end plates 220 are disposed opposite to two ends of the cell stack 210 along the first direction, and at least one first end plate 220 is provided with the limiting member 221. The two end plates can press the fixed cell stack 210 from both sides in the first direction, thereby better applying a pre-tightening force to the cell stack 210, preventing the cell stack 210 from directly contacting the battery container.

In this embodiment, the battery container includes at least two second end plates 100 disposed opposite to each other and hollow, and the second end plates 100 are provided with the limiting grooves 110. The battery container includes two second end plates 100, and the inside thereof is hollow, so that the weight of the battery module can be reduced; specifically, the battery accommodating part is specifically a frame of a battery pack, the second end plate 100 is an edge beam of the battery pack, and after the frame of the battery pack is built, the battery module 200 is directly put in the frame, so that the assembly process can be simplified, and the production efficiency can be improved.

As shown in fig. 2 and 3, optionally, the limiting member 221 is a limiting boss, a sliding block, or an elastic buckle fixed on a side wall of the first end plate 220. In this embodiment, the limiting member 221 is a limiting boss and is directly clamped in the limiting groove 110, which is simple and reliable. Of course, a sliding block can be selected, and after the sliding block is pushed into the limiting groove 110 along the second direction, a stop block is arranged between the sliding block and the limiting groove 110 to prevent the sliding block from sliding out; or the elastic buckle is used, after the elastic buckle is buckled back to be close to the side wall of the first end plate 220, the first end plate 220 is slid into the battery accommodating part along the first direction, and after the elastic buckle reaches the position of the limiting groove 110, the elastic buckle is popped up and fixed in the limiting groove 110; the two modes are more convenient to install, but the manufacturing process is more complex, and the person skilled in the art can select the mode according to specific requirements.

Optionally, the two first end plates 220 are provided with the limiting members 221, and the two opposite inner walls of the battery receiving member are provided with the limiting grooves 110. The first end plates 220 at two ends along the first direction from the cell stack 210 are provided with the limiting pieces 221, so that the cell stack 210 can be limited and fixed from two ends, and a pretightening force is applied, so that the fixation is more stable and reliable.

Optionally, a plurality of limiting members 221 are disposed on each of the first end plates 220 at intervals, and a plurality of limiting grooves 110 corresponding to the limiting members 221 one by one are formed on the inner wall of the battery receiving member. In this embodiment, two limiting members 221 are disposed at intervals along the third direction; of course, the materials can be distributed and arranged, for example, 3 materials are arranged in a 'delta' shape, and 4 materials are arranged in a 'field' shape, which is not repeated here. The positioning effect in the second direction and the third direction can be further improved by the plurality of limiting members 221 and the limiting grooves 110, and the battery module 200 is prevented from loosening and falling off.

Further, the first end plate 220 and the second end plate 100 are hollow structures, and the reinforcing ribs are provided in the hollow cavities, so that the weight of the battery module can be reduced, the mechanical strength is ensured, and the use safety and reliability are ensured.

As shown in fig. 3, the limiting member 221 is the limiting boss cooperatively inserted in the limiting groove 110, and the cross-sectional area of the limiting boss gradually increases during the process of extending from one end of the limiting boss away from the first end plate 220 to the other end. The spacing boss of setting like this can form a boss similar to funnel type, and its outer end cross-sectional area is less, can be convenient for spacing boss insert spacing inslot 110, plays the guide effect, further improves installation effectiveness.

Alternatively, the first end plate 220 may be provided with a mounting hole 222 in the second direction or the third direction, and an external device may apply a force in the first direction to the first end plate 220 through the mounting hole 222. In this embodiment, the mounting holes 222 are formed along the second direction, and two mounting holes are disposed at two ends of the first end plate 220 along the third direction at intervals. The setting of this mounting hole 222 is used for connecting external equipment, and external equipment is through exerting the power along the first direction to mounting hole 222, with the battery core stack 210 is crowded flat, conveniently puts into the battery and holds the piece, and external equipment releases the connection with mounting hole 222 afterwards, and first end plate 220 can with the inner wall butt of battery holds the piece to by exerting the pretightning force of certain size, simple to operate can improve installation effectiveness.

The embodiment also provides a battery pack, which comprises a battery management module and the battery module according to any one of the above schemes, wherein the battery management module is electrically connected with the battery module. The battery pack uses the battery module, the weight of the battery module is lighter, the number of parts of the battery module is smaller, and the production efficiency and the production cost can be improved.

It is still another object of the present utility model to provide an electronic device including the battery pack according to the above aspect. The electronic device uses the battery pack to supply power, and can be specifically an apparatus or device requiring power consumption, such as an electric automobile, an electric bicycle or a ship, and the embodiment is not particularly limited. The electronic equipment uses the battery pack with lighter weight, so that the cruising ability can be improved, and the production cost is reduced.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. Battery module, including battery holder and place battery module (200) in the battery holder, its characterized in that:

The battery module (200) comprises a first end face, the battery accommodating part comprises a second end face which can be abutted with the first end face, one of the first end face and the second end face is provided with a limiting groove (110), the other one of the first end face and the second end face is provided with a limiting part (221), and the limiting part (221) can extend into and be accommodated in the limiting groove (110).

2. The battery module according to claim 1, wherein the battery module (200) includes a cell stack (210) and a first end plate (220), any end face of the cell stack (210) disposed opposite in a first direction being abutted against the first end plate (220), a side wall of the first end plate (220) away from the cell stack (210) being the first end face, the first end face being provided with the stopper (221); the first direction is a thickness direction of the cell units (211) of the cell stack (210).

3. The battery module according to claim 2, wherein two first end plates (220) are provided, the two first end plates (220) are oppositely disposed at both ends of the cell stack (210) in the first direction, and at least one first end plate (220) is provided with the stopper (221).

4. A battery module according to claim 3, wherein both of the first end plates (220) are provided with the stopper (221), and both of the inner walls of the battery container opposite to each other are provided with the stopper groove (110).

5. The battery module according to claim 4, wherein each of the first end plates (220) is provided with a plurality of limiting members (221) at intervals, and the inner wall of the battery receiving member is provided with a plurality of limiting grooves (110) in one-to-one correspondence with the limiting members (221).

6. The battery module according to any one of claims 1 to 5, wherein the limiting member (221) is a limiting boss, a slider, or an elastic buckle protruding from the first end surface.

7. The battery module according to claim 6, wherein the limiting member (221) is the limiting boss inserted in the limiting groove (110), and the cross-sectional area of the limiting boss gradually increases during the process of extending from one end of the limiting boss away from the first end face to the other end of the limiting boss.

8. The battery module according to any one of claims 2 to 5, wherein the first end plate (220) is provided with a mounting hole (222), and an external device can apply a force in the first direction to the first end plate (220) through the mounting hole (222).

9. Battery pack, characterized by comprising a battery management module and a battery module according to any one of claims 1-8, said battery management module being electrically connected to said battery module.

10. An electronic device comprising the battery pack of claim 9.